This page describes how to use jutge-code-metrics, a tool that provides measures extracted from a static inspection of the submitted code.
In order to use the toolkit, you need to have its external dependencies installed: cloc. Additionally, if you want to measure the complexity of Haskell scripts, you will also need to install argon.
In order to generate code metrics, simply execute jutge-code-metrics along with the path of the script you want to measure. The script will output all the data in JSON format.